Question
Column I and column II contains four entries each. Entries of column I are to be matched some entries of column II. One or more than one entries of column I may have the matching with the same entries of column II.
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Solution
α−emission results in decrease in mass no. by 4 units and decrease in atomic no. by 2 units as alpha particles are helium nuclei, 42He.
β−emission results in increase in atomic no. by one unit as beta particles have negative charge without mass. They are electrons, 0−1e
γ−emission results in no change in atomic no. and no change mass no. as they have only energy. They do not have mass and charge.
β+ (Positron) emission results in decrease in atomic no. by one unit as positrons have positive charge without mass. They are anti particles of electrons, 0+1β
β−emission results in increase in atomic no. by one unit as beta particles have negative charge without mass. They are electrons, 0−1e
γ−emission results in no change in atomic no. and no change mass no. as they have only energy. They do not have mass and charge.
β+ (Positron) emission results in decrease in atomic no. by one unit as positrons have positive charge without mass. They are anti particles of electrons, 0+1β
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